Flame retardant poly(siloxane) copolymer compositions, methods of manufacture, and articles formed therefrom

a polycarbonate and composition technology, applied in the field of polymer compositions, can solve the problems of difficult formulation, limited set of polycarbonates used in aircraft and other directions, and achieve the effect of reducing the number of polycarbonates

Active Publication Date: 2012-10-04
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, only a very limited set of polycarbonates are used in aircraft and other transportation applications particularly interior parts such as windows, partition walls, ceiling panels, cabinet walls, storage compartments, galley surfaces, light panels, and the like.
Certain polycarbonate-polyetherimide blends also have low melt flow, but can be difficult to formulate so as to provide bright white compositions.

Method used

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  • Flame retardant poly(siloxane) copolymer compositions, methods of manufacture, and articles formed therefrom
  • Flame retardant poly(siloxane) copolymer compositions, methods of manufacture, and articles formed therefrom
  • Flame retardant poly(siloxane) copolymer compositions, methods of manufacture, and articles formed therefrom

Examples

Experimental program
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Effect test

examples

Materials.

[0118]The descriptions of the polycarbonates and polycarbonate copolymers used in the Examples are described in Table 1. Methods for preparing the brominated polycarbonates and the poly(siloxane-carbonate) copolymers are described after Table 1.

[0119]In Table 1, a reference to D10, D30, or D45 means a dimethylsiloxane block having an average length of 10.5+ / −2.5, with two additional terminal silicon group (with silicon hydride levels of less than 20 ppm, volatiles of less than 0.4%), 30+ / −4 with two additional terminal silicon groups (with silicon hydride levels of less than 20 ppm, volatiles of less than 0.4%, and D3 and D4 levels of less than 10 and 1000 ppm respectively), or 45+ / −5 with two additional terminal silicon groups (with silicon hydride levels of less than 20 ppm, volatiles of less than 0.4%, and D3 and D4 levels of less than 10 and 1000 ppm respectively.). The values of D and wt % siloxane for the copolymers in Table 1 were as charged to the reactor.

[0120]The...

examples 46-49

[0193]These Examples show the synergistic effect of siloxane from a poly(etherimide-siloxane) and a brominated polymer on heat release and smoke density in polycarbonate compositions. Results are shown in Table 15. Results showing the effect of poly(etherimide-siloxane) concentration on DsMax are plotted in the FIG. 1, and results showing the effect of poly(etherimide-siloxane) concentration on OSU heat release are plotted in FIG. 2.

TABLE 15ComponentsEX 46EX 47EX 48CEX 49TBBPA-BPA40.0040.0040.0040.00SILTEM7.005.002.500.00PC53.055.057.560.0Additive0.060.060.060.0Total FormulationWt % Siloxane2.61.90.90.0Wt % Bromine10.410.410.410.4PropertiesMVR 6 minutes5.55.65.76.8NI-125, RTDuctility0.00.00.00.0J / m13011911790.8ft-lbs / in2.42.22.21.7MAI, RTDuctility100100100100Energy to maxJ75.075.878.278.1Energy to failureJ81.681.883.684.3Energy, Total-AJ81.781.983.784.3Density, average1.2851.2861.2871.289HDT-ASTM-G1.8 MPa138.4139.7139.7141.5OSU Test FAR 25.853 (d) Appendix F, Part IV2 Min OSUAverage...

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Abstract

A poly(siloxane) copolymer composition comprising: a first polymer comprising a first repeating unit, and a poly(siloxane) block unit, a second polymer different from the first polymer and comprising of bromine; and optionally, one or more third polymers different from the first polymer and second polymer; wherein siloxane units are present in the composition in an amount of at least 0.3 wt %, and bromine is present in the composition in an amount of at least 7.8 wt %, each based on the sum of the wt % of the first, second, and optional one or more third polymers; and further wherein an article molded from the composition has an OSU integrated 2 minute heat release test value of less than 65 kW-min/m2 and a peak heat release rate of less than 65 kW/m2, and an E662 smoke test Dmax value of less than 200.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation-in-part of U.S. patent application Ser. No. 13 / 207,930, filed Aug. 11, 2011, which claims priority to India Patent Application No. 920 / DEL / 2011, filed Mar. 31, 2011, the contents of both applications being incorporated by reference herein in their entirety.BACKGROUND OF THE INVENTION[0002]This disclosure generally relates to polymer compositions, and more particularly to flame retardant poly(siloxane) copolymer compositions containing specific combinations of siloxane block copolymers.[0003]Flame retardant (FR) polymers and polymer blends, for example polycarbonates and polycarbonate blends with UL V0 and 5V A and B Underwriters Laboratories flammability ratings are widely prepared and used, especially in a wide variety of electrical and electronic applications. Conversely, only a very limited set of polycarbonates are used in aircraft and other transportation applications particularly interior parts such...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B1/08B32B9/04C08L83/10
CPCC08L83/10Y10T428/1352C08L69/00Y10T428/31663C08J5/00C08G77/448B64D47/00C08L63/00C08L2201/02C08L2205/03
Inventor SYBERT, PAUL D.SHULTZ HUME, LAURA G.HOOVER, JAMES F.EVANS, THOMAS L.
Owner SHPP GLOBAL TECH BV
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